• Title/Summary/Keyword: Chestnut tree Dichocrocis punctiferalis

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Study on Chestnut Insect Pests by Environmentally Friendly Controls in Korea (친환경적 밤 종실해충 방제 연구)

  • Lee, Chong-Kyu
    • Korean journal of applied entomology
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    • v.48 no.1
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    • pp.95-100
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    • 2009
  • This study was conducted to develop environmentally friendly control techniques to reduce chestnut insect pests. The study sites were selected in intensive chestnut orchards of Jinju city, Gyeongnam province. In early and middle-ripening cultivars of chestnut tree, the damage of chestnut fruits by Dichocrocis punctiferalis was significantly lower in wromstop than other treatment such as wromstop+wood vinegar, Capture-machine (p<0.05), While there was no significant difference among treatments in late-ripening cultivars. The hight control effect for D. punctiferalis was showed the highest in wromstop treanment with 40.49% and 41.89% in early and late-ripening cultivars. The control effects for Curculio sikkimensis in late-ripening cultivars of chestnut tree were 34.59% in wromstop imidacloprid treatment and 28.94% in air control treatment.

The Changes of Damage Rate by Peach Pyralid Moth, Dichocrocis punctiferalis (Lepidoptera: Pyralidae) in Chestnut Orchards from 1995 to 2010 Year (밤나무림에서 1995-2010년의 복숭아명나방의 피해율 변화)

  • Lee, Chong-Kyu
    • Korean journal of applied entomology
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    • v.50 no.4
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    • pp.379-382
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    • 2011
  • The damage rates of peach pyralid moth(Dichocrocis punctiferalis), which damages the chestnut fruits, were investigated annually from 1995 to 2010 according to year, region, and maturity. The damage rate by D. punctiferalis was the highest (34.5%) in 1998 and was the lowest (17.9%) in 2000. The pattern of the damage rate showed a repeating three-year cycle. There was a negative correlation ($-0.6261^*$) between rainfall and damage rate. There was a positive correlation ($0.5826^*$) between temperature and damage rate. The average damage rate of all surveyed regions was 22.2%. Of the surveyed areas, Hapcheon had the highest at 27% and Hamyang had the lowest at 15.0%. The damage rate of chestnut fruit depending on the maturity was 26.1% in an early maturing cultivar (Dantaek), and 19.3% and 21.1% in a late maturing cultivar (Eungi) and a medium maturing cultivar (Chukpa), respectively.

Management of Chestnut Insect Pests by Friendly Environmental Controls in Korea (친환경적 방법에 의한 밤 종실해충의 관리)

  • Lee, Chong-Kyu;Kim, Jong-Kab;Goo, Gawn-Hyo;Kang, Sung-Mee;Yun, Seok-Rak;Seo, Dong-Jin
    • Journal of Korean Society of Forest Science
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    • v.97 no.1
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    • pp.30-34
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    • 2008
  • This study was conducted to develop environmental techniques to reduce chestnut insect pests. The study sites were selected in intensive chestnut orchards of Jinju city, Gyeongnam province. In early and middleripening cultivars of chestnut tree, the damage of chestnut fruits by Dichocrocis punctiferalis was significantly lower in wromstop than other treatment such as Capture-machine, Nemacatch and Naphthalene (p<0.05), while there was no significant difference among treatments in late-ripening cultivars. The control effect of D. punctiferalis showed the highest in wormstop treanment with 90.68% and 80.58% in early and middle-ripening cultivars. The control effects for Curculio sikkimensis in late-ripening cultivars of chestnut tree was 80.58% in Nemacatch and 77.90% in Wormstop treatment.